Rotary machine



Feb. 2s, 192s. f 1,660,464:

l. H. wlLsEY i ROTARY MACHINE Filed Maron '12. 192e 2 sheets-snee: 2f

. i l I A Patented F el). 28, 1928.

UNITED STATES PATENT OFFICE.

IRVEN H. WILSEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO JAMES B. TUTHILL, OFCHICAGO, ILLINOIS.

ROTARY MACHINE.

Application led March 12, 1926. Serial No. 94,149.

The invention relates to improvements in rotary machines which may beused either as hydraulic pumps or engines, and relates more particularlyto rotary machines of the gear type.

The primary object of the present invention is to provide a new andimproved rotary gear hydraulic machine which is adjustable to vary thedirection of flow and the volume of flow in either direction, therebydispensing with the usual by-pass means employed for this purpose,saving the power expended in handling the fluid that is ordinarilyby-passed, and permitting starting under no load conditions Withnegligible starting torque.

A further object is to provide a variable rotary gear pump or enginehaving no valves for varying the flow, and in which wear'effecting Howmay be compensated for.

. Still another object is to provide a variable gear pump that does notleak liquid or vapor when handling volatile liquids, thus eliminatinglire hazard and other obnoxious conditions. c

A further object is to provide a variable gear pump which is simple and1nex pensive iii construction, and which is accurate and efficient inoperation,over a Wide range, particularly, at partial loads since nopart of the fluid is by-passed.

Further objects and advantages will becoine apparent as the descriptionproceeds.

ln lie accompanying drawings, Figure 1 is a side elevation of a gearpump embodying the features of my invention.

Fig. 2 is an end elevation of the pump.

Fig. 3 is a longitudinal sectional view of the pump taken substantiallyalong line 3-3 of Fig. 2.

Fig.- 4 is a transverse section of the pump taken substantially alongline 4 4 of Fig. 3, the gear parts being shown in position to produce amaximum flow in one direction.

Fig. 5 is a View similar to-Fig. 4 but with the gear parts adjustedthrough 180 to reverse the direction of flow through the pump.

Fig. 6 is a view similar to Fig. 4 but with the gear parts adjusted intoa neutral position in which no flow results.

Fig. 7 is a perspective view of the adjustable head.

" and 17 which Fig. 8 is a fragmentary plan View of a detail ofconstruction. v

While the invention is susceptible of various niodiiications andalternative constructions, I have shown in the drawings andA will hereindescribe in detail the preferred embodiment, but it is to be understoodthat I do not thereby intend to limit the invention to the specificform` disclosed, but intend to cover all modifications and alternativeconstructions falling Within the spirit and scope of the invention asexpressed in the appended claims.

Referring more particularly to the drawings, tlie exemplary embodimentof the invention consists of a ump casing 10 lwhich is formed integralwith a suitable base 11,v and which preferably is cylindrical in shape.The interior of the casing 10Ais formed in opposite sides with twoarcuate fluid admission and discharge chambers 12 and 13 whichareseparated at their adjacent ends by diametrieally opposed lands 14and 15. The upper ends of the chambers 12 and 13 communicaterespectively with ports 16 preferably open from the casing 10 at rightangles, and which are adapted to be connected in any desired fluid line(not shown). Of the casing 10, one end is closed by a fixed head 18preferably formed integral therewith, and the other end is normallyclosed by a removable head 19 secured thereto by means of a plurality ofscrew bolts 20. The heads 18 and 19 are formed respectively withoutwardly and axially projecting bearing hubs 21 and 22.

rotor 23 is mounted in the casing 10, and is providedwith a drive'shaft24 adapted to be connected to a suit-able source of power (not Shown).Theshaft-24 extends outwardly through the bearing liub 21, and in thepresent instance through a bushing 25, a suitable packing 26, and apacking gland 27,v inthe hub. The gland 27is clamped tightly against thepacking 26 by a stuiing box 28 which lits over the reduced outer end ofthe hub 2l, and which is adjustably secured to the casing 10 by means Yof fixed studs 29. The rotor23 comprises a circular plate 30 formed atits outer end with laterally projecting and circumferentially spacedinternal gear teeth 31. The spaces 32 between these teeth are adaptedupon rotation of the shaft 24 to be moved successively across the lands14 and 15 from communication with one to the other of the chambers 12and 13.

Mounted between the outer end of the rotor 23 and the head'19 is arotatably adjustable carrier 33 which in the present instance is in thegeneral form of a'disk. 0n its inner face the carrierv 33 has a pin 34and an annular recess 35 about the pin, the pin extending inwardlybetween the teeth 31 and eccentrically of the shaft 24. An idler pinion36 having teeth 37 is rotatably mounted on a bushing 38 on the Apin 34,and has a hub 39 fitting into the-recess 35. The pinion'36 meshes at oneside with the teeth 31 of therotor 23, and will be rotated upon rotationof the latter. The other6 side of the pinion 36 is spaced from the'teeth31,

and is separated therefrom by a crescent shaped projection or partition40 extending inwardly from the carrier 33 and bearing against the innerends of the teeth 31 and the outer ends of the'teeth 37 throughapproximately 180 degrees. The outer and inner curved surfaces of thepartition 40 thus conform respectively to the curvature of the internalgear and of the pinion 36.

To adjustably support the carrier 33, it is provided with a haft 41 inalinement with the shaft 24 and extending outwardly through the hub 22,and the head 19 and the carrier are formed with coacting annularshoulders 42 and 43 respectively, concentric to the shaft 41. Keyed tothe outer end of the shaft 41 is an adjusting handle 44. A locking lever45 is threaded onto the shaft 41 next to the handle 44, and upon beingtightened will clamp the carrier 33 in adjusted position against thehead 19.

The operation of the pump is as follows: Assuming that thesha'ft 24 isbeing driven in a counterclockwise direction as viewed in Fig. 4 andthat the carrier 33 is positioned as shown in that figure, with thepartition 40 over and a little oft center to the right of the lower land15, the teeth 31 and 37 will move apart to the left and will, movetogether 'to the right of the land 14, thereby causing iiuid to be drawnfrom the chamber 12 into `the spaces between the teeth v37, carried pastthe partition 40, and :torcibly discharged into the chamber 13. Sincethe separating movement of the teeth 31 and 38 begins at the left end ofthe land 14, amaximum iowthrough the pump will be l.xobtained If thecarrier is adjusted into the position shown in Fig. 5, i; e. through 180degrees, the teeth will move together to the right of the land 15,thereby reversing' the direction of the maximum flow.- If the carrier 33is adjusted to position the partition 40 between the lands 14 and 15, atthe left as shown in Fig. 6 or at the right directly opposite, no iiowwill result, since the spaces 32. opening into oneA of the chambers v 12and 13'are closedA by tli'e partition. Since some of the teeth 31 and 37move apart and others move together in the same side Off the casing 10,iiuid vdrawn from the other chamber will be returned thereto. If thecarrier 33 is adjusted into diierent positions intermediate thosedescribed above, diierent volumes of iiow in either direction willresult. v

It will be obvious that I have provided a novel gear ump which isadjustable to give any desired) flow in either direction. The adjustmentcan be easily and quickly, effected. The pump is simple and inexpensivein construction, vand is efiicient and accurate inv operation. While themachine has been specifically described asa pump, it is to be understoodthat it may also be used as an engine.

I claim as my invention:

1.- A rotary machine having, in combination, a casing having inlet andoutlet ports in opposite sides, an internal gear member rotatable insaid casing, said orts extending around opposite sides of sai 'gearmember and communicating with the spaces between the gear teeth, anidler pinion meshing with said gear member and mounted eccentrically`thereto, a crescent partition between said gear member and sa1d pinlon,a carrier rotatably adjustable in said casing about the axis of saidmember, said carrier supporting said pinion and said partition, meansfor adjusting said carrier, and means for clamping said carriery inadjusted position.

2. A rotary machine. having, in. combination, a casing having aremovable head and having inlet and outlet ports, an internal gearmember rotatable in said casing, said ports extending around oppositesides of said gear member and communicating with the spaces between thegear teeth, a pinion meshing with said gear memberi and mountedeccentrically thereto, a crescent partition between said gear member andsaid pinion, a carrier rotatably adjustable on said head and having ashaft extending outwardly there.- through, said carrier supporting saidpinion and said partition, an operating handle on said shaft foradjusting said carrier, and

supporting said inner gear member and said cut-off means, said lastmentioned means being adjustable to adjust the position of said innergear lmember and said cut-ofi' means relative to said ports so as tovary the :flow through said machine.

4. A rotary engine having, in combination, a easing having inlet andOutlet ports, a rotor in said casing, said rotor having internal gearteeth, the spaces between which are adapted to communicate successivelywith said ports, an 'idler pinin engaging said teeth, a crescentpartition between one side of said pinion and said teeth, and arotatably adjustable member in said casing supporting said pinion andsaidpartition.

5. A rotary `machine having, in combination, a casing having a removablehead and having inlet and outlet ports, a rotor in said casing,said'rotor having internal gear teeth at its periphery, the spacesbet-ween said teeth opening at said periphery, a rotatable disk memberin said casing, a gear member journaled in said rotatable member andmeshing with said internal gear teeth, and means on said rotatablemember projecting between said gear member and said internal gear teeth,said member being adjustable to reverse the flow of liquid and to adjustsaid flow in either direction.

Lacona-1 6. A rot-ary machine having, in combination, a casing havinginlet and outlet ports,

7. A rotary machine having, incombina' tion, a casingv having spacedinlet and outlet ports, .cooperating inner and outer gear members insaid casing, means for rotating one of said gear members, cut-off meansbetween said inner `and outer gear' members, and means for adjustingsaid ports and said cut-ofi:l means relatively to` each other to Varythe flow, through said machine.

In testimony whereof, I have hereunto affixed my signature.

IRVEN H. WILSEY.

